The blue circle symbol used to represent diabetes.

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The Wall Street Journal reports on a study that has taken place since 1995 with 200,000 people. They evaluated the risks of diet, BMI, exercise, smoking and several other factors on how likely you were to develop diabetes. No one in the beginning of the study had heart disease, cancer or diabetes. During the study about 10% of the men and 8% of the women developed diabetes. BMI was found to have the most significant influence on contracting the disease. Of course, BMI is a factor of diet.